<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>文件上传功能演示</title>
</head>
<body>
    <form method="post" action="/upload" enctype="multipart/form-data">
        <input name="username" type="text">
        <input name="password" type="password">
        <input name="some_file" multiple type="file">
        <button type="submit">提交</button>
    </form>
</body>
</html>